docs(agent): mark claim as the loop-internal step-boundary operation

.agents/notes/implemented/architecture/2026-07-31-claimed-pre-step-inbox-lifecycle.i18n.yaml

@@ -2,5 +2,5 @@
 # side as of the last confirmed-consistent state. Both languages carry equal authority;
 # after editing either side, bring the other along and re-record with:
 #   pnpm run verify-translation-pairing --write .agents/notes/implemented/architecture/2026-07-31-claimed-pre-step-inbox-lifecycle.md
-2026-07-31-claimed-pre-step-inbox-lifecycle.md: 6aa829ee8489ee0d19c4af16e527774f8751eea8
-2026-07-31-claimed-pre-step-inbox-lifecycle.zh.md: 03dc58fed3ecc3842faab3727286c6ceda9399a5
+2026-07-31-claimed-pre-step-inbox-lifecycle.md: 5184c00335b3084a8eb6d58fa33a0af8d3a16ed6
+2026-07-31-claimed-pre-step-inbox-lifecycle.zh.md: 4966ccc8a3a7535022c04f9445ca75102ccca71e

.agents/notes/implemented/architecture/2026-07-31-claimed-pre-step-inbox-lifecycle.md

@@ -16,7 +16,7 @@ Before every proposed step, `Inbox.claim(target)` atomically removes the complet
 
 `PreStepDecision` is `{ kind: 'reject' } | { kind: 'enter'; messages: UserMessage[] }`. Reject opens no step, leaves the claimed batch removed, and closes the turn as blocked without any step events. Empty entry, cancellation, and failure before `step/start` likewise close a balanced no-step turn. Enter supplies the complete batch appended as `user/message` events after `step/start`. A listener wrapping `next()` preserves downstream changes unless it intentionally replaces them, so all message rewrites settle once in the final return value. There is no `agent/prompt-prepare`, `agent/prompt-submit`, or `agent/step` seam.
 
-The durable inbox remains two `UserMessage[]` lists addressed by `MessageId`. `append`, `prepend`, and `splice` take a target, while `replace(messageId, newMessage)` and `remove(messageId)` locate the pending message across both lists before committing a normalized splice. Replacement may change identity and emits the old message as discarded followed by the new message as inserted. Every insertion emits `agent/inbox/inserted { message }`; an ordinary removal records `outcome: 'canceled'` and emits `agent/inbox/discarded { message }`. These live events add no placement, outcome, or batch fields.
+The durable inbox remains two `UserMessage[]` lists addressed by `MessageId`. `append`, `prepend`, and `splice` take a target, while `replace(messageId, newMessage)` and `remove(messageId)` locate the pending message across both lists before committing a normalized splice. Replacement may change identity and emits the old message as discarded followed by the new message as inserted. Every insertion emits `agent/inbox/inserted { message }`; an ordinary removal records `outcome: 'canceled'` and emits `agent/inbox/discarded { message }`. Claiming is the loop's internal step-boundary operation on the inbox and records pure deletions without notifications or an outcome, so the loop can publish claimed events itself. These live events add no placement, outcome, or batch fields.
 
 The two event surfaces have separate consumers. Observers following one message use `agent/inbox/inserted`, `claimed`, and `discarded`. Whole-queue consumers, including the Web queue projection and reconnect baseline, use the durable `agent/inbox/spliced` stream; UI edits and removals route through `Inbox.splice()` or another Inbox mutation method so the same projection records every change.
 

.agents/notes/implemented/architecture/2026-07-31-claimed-pre-step-inbox-lifecycle.zh.md

@@ -16,7 +16,7 @@ Status: implemented
 
 `PreStepDecision` 为 `{ kind: 'reject' } | { kind: 'enter'; messages: UserMessage[] }`。reject 不会打开步骤，会让已领取批次保持已删除，并将轮次关闭为 blocked，且不产生任何步骤事件。空的 enter、取消以及 `step/start` 前的失败同样会关闭一个边界平衡的无步骤轮次。enter 提供在 `step/start` 后以 `user/message` 追加的完整批次。包装 `next()` 的监听器会保留下游变更，除非有意替换，因此全部消息改写只在最终返回值中一次性结算。系统不再存在 `agent/prompt-prepare`、`agent/prompt-submit` 或 `agent/step` seam。
 
-持久 inbox 仍是两份通过 `MessageId` 寻址的 `UserMessage[]` 列表。`append`、`prepend` 与 `splice` 接受 target；`replace(messageId, newMessage)` 与 `remove(messageId)` 则在提交规范化 splice 前，通过 `MessageId` 跨两份列表定位待处理消息。替换可以改变标识，并先将旧消息作为 discarded 发布，再将新消息作为 inserted 发布。每次插入发出 `agent/inbox/inserted { message }`；普通删除记录 `outcome: 'canceled'` 并发出 `agent/inbox/discarded { message }`。这些实时事件不增加 placement、outcome 或批次字段。
+持久 inbox 仍是两份通过 `MessageId` 寻址的 `UserMessage[]` 列表。`append`、`prepend` 与 `splice` 接受 target；`replace(messageId, newMessage)` 与 `remove(messageId)` 则在提交规范化 splice 前，通过 `MessageId` 跨两份列表定位待处理消息。替换可以改变标识，并先将旧消息作为 discarded 发布，再将新消息作为 inserted 发布。每次插入发出 `agent/inbox/inserted { message }`；普通删除记录 `outcome: 'canceled'` 并发出 `agent/inbox/discarded { message }`。领取是循环在 inbox 上的内部步骤边界操作，记录不带通知或 outcome 的纯删除，因此循环可以自行发布 claimed 事件。这些实时事件不增加 placement、outcome 或批次字段。
 
 两类事件表面服务不同消费方。跟踪单条消息的观察方使用 `agent/inbox/inserted`、`claimed` 与 `discarded`。包括 Web 队列投影和重连基线在内的整体队列消费方使用持久 `agent/inbox/spliced` 流；UI 编辑与移除经 `Inbox.splice()` 或其他 Inbox 变更方法进入，从而让同一投影记录所有变化。
 

docs/core-data-structures/core.i18n.yaml

@@ -2,5 +2,5 @@
 # side as of the last confirmed-consistent state. Both languages carry equal authority;
 # after editing either side, bring the other along and re-record with:
 #   pnpm run verify-translation-pairing --write docs/core-data-structures/core.md
-core.md: ea5900ba4271869d3fef1c9d1014f26a166b4418
-core.zh.md: f6f5295a66633b181b0791f839d3014e245c4eb3
+core.md: 6886d9f15c37a6f3fd9cd825fb4c3f24d577db10
+core.zh.md: f89365dcdd620cd749c7ccca9ee2cc2da71118ac

docs/core-data-structures/core.md

@@ -485,7 +485,7 @@ Source: [`packages/core/agent/src/types.ts`](../../packages/core/agent/src/types
 type InboxTarget = 'next-turn' | 'next-step'
 ```
 
-Every pending occurrence is its `UserMessage`; `MessageId` is the sole identity. `Inbox.append`, `prepend`, `replace`, `remove`, `clear`, and `splice` record normalized durable `agent/inbox/spliced` mutations and reject duplicate pending ids. `replace(messageId, newMessage)` and `remove(messageId)` locate the pending message across both lists; replacement may change identity and emits the old message as discarded followed by the new message as inserted. Ordinary removals and `clear()` are cancellations. `claim(target)` atomically removes the proposed step batch through pure deletion splices; the loop separately emits per-message claimed notifications. Whole-queue consumers such as UI projections reconstruct `nextTurn` and `nextStep` from the durable splices, while consumers following one message use the exact `agent/inbox/inserted`, `claimed`, and `discarded` notifications.
+Every pending occurrence is its `UserMessage`; `MessageId` is the sole identity. `Inbox.append`, `prepend`, `replace`, `remove`, `clear`, `splice`, and `claim` record normalized durable `agent/inbox/spliced` mutations and reject duplicate pending ids. `replace(messageId, newMessage)` and `remove(messageId)` locate the pending message across both lists; replacement may change identity and emits the old message as discarded followed by the new message as inserted. Ordinary removals and `clear()` are cancellations. `claim(target)` removes the proposed step batch — all `next-step` input plus, at a turn boundary, one `next-turn` message — through pure deletion splices without emitting discarded notifications, and the loop separately emits per-message claimed notifications. Whole-queue consumers such as UI projections reconstruct `nextTurn` and `nextStep` from the durable splices, while consumers following one message use the exact `agent/inbox/inserted`, `claimed`, and `discarded` notifications.
 
 ```ts type-equiv
 /** Options for {@link Agent.cancel}. */

docs/core-data-structures/core.zh.md

@@ -493,7 +493,7 @@ type SessionEvent<T extends SessionEventType = SessionEventType> = {
 type InboxTarget = 'next-turn' | 'next-step'
 ```
 
-每个待处理入队项就是其 `UserMessage`；`MessageId` 是唯一标识。`Inbox.append`、`prepend`、`replace`、`remove`、`clear` 与 `splice` 会记录规范化的持久 `agent/inbox/spliced` 变更，并拒绝重复的待处理 id。`replace(messageId, newMessage)` 与 `remove(messageId)` 通过 `MessageId` 跨两份列表定位待处理消息；替换可以改变标识，并先将旧消息作为 discarded 发布，再将新消息作为 inserted 发布。普通删除和 `clear()` 都表示取消。`claim(target)` 通过纯删除 splice 原子移除拟进入步骤的批次；循环另行逐条发出 claimed 通知。UI 投影等整体队列消费方通过持久 splice 重建 `nextTurn` 与 `nextStep`，而跟踪单条消息的消费方使用精确的 `agent/inbox/inserted`、`claimed` 与 `discarded` 通知。
+每个待处理入队项就是其 `UserMessage`；`MessageId` 是唯一标识。`Inbox.append`、`prepend`、`replace`、`remove`、`clear`、`splice` 与 `claim` 会记录规范化的持久 `agent/inbox/spliced` 变更，并拒绝重复的待处理 id。`replace(messageId, newMessage)` 与 `remove(messageId)` 通过 `MessageId` 跨两份列表定位待处理消息；替换可以改变标识，并先将旧消息作为 discarded 发布，再将新消息作为 inserted 发布。普通删除和 `clear()` 都表示取消。`claim(target)` 通过无 outcome 的纯删除 splice 移除拟进入步骤的批次——全部 `next-step` 输入，外加轮次边界上的一条 `next-turn` 消息——且不发出 discarded 通知；循环另行逐条发出 claimed 通知。UI 投影等整体队列消费方通过持久 splice 重建 `nextTurn` 与 `nextStep`，而跟踪单条消息的消费方使用精确的 `agent/inbox/inserted`、`claimed` 与 `discarded` 通知。
 
 ```ts type-equiv
 /** Options for {@link Agent.cancel}. */

packages/core/agent/README.i18n.yaml

@@ -2,5 +2,5 @@
 # side as of the last confirmed-consistent state. Both languages carry equal authority;
 # after editing either side, bring the other along and re-record with:
 #   pnpm run verify-translation-pairing --write packages/core/agent/README.md
-README.md: a3781f1ab466e6825a80c529c261b3a4ea262092
-README.zh.md: 77a082f3ff83caf4f3934156e4546a9a227d42cc
+README.md: c3d6e6c24480894b6059417c1ab89db7aa0d7fa2
+README.zh.md: 16ee8f5e6c483555839b0c3ab174e2e2356b1359

packages/core/agent/README.md

@@ -62,7 +62,7 @@ Turn and step boundaries and the model token stream are durable `session/event`
 
 The handle every plugin programs against:
 
-- `agent.inbox` — the agent-owned projection of durable `agent/inbox/spliced` events. `nextTurn` and `nextStep` expose pending `UserMessage` values. `append`, `prepend`, `replace`, `remove`, `clear`, and `splice` mutate them; `replace(messageId, newMessage)` and `remove(messageId)` locate the pending message across both lists. Replacement may change identity and publishes the old message as discarded followed by the new message as inserted. Ordinary removals and `clear()` are durable cancellations and emit `agent/inbox/discarded`. `claim(target)` atomically removes the next proposed batch with pure deletion splices; the loop then emits `agent/inbox/claimed`. `MessageId` is the only occurrence identity and must remain unique while pending.
+- `agent.inbox` — the agent-owned projection of durable `agent/inbox/spliced` events. `nextTurn` and `nextStep` expose pending `UserMessage` values. `append`, `prepend`, `replace`, `remove`, `clear`, `splice`, and `claim` mutate them; `replace(messageId, newMessage)` and `remove(messageId)` locate the pending message across both lists. Replacement may change identity and publishes the old message as discarded followed by the new message as inserted. Ordinary removals and `clear()` are durable cancellations and emit `agent/inbox/discarded`. `claim(target)` removes the next proposed batch with pure deletion splices; the loop then emits `agent/inbox/claimed`. `MessageId` is the only occurrence identity and must remain unique while pending.
 - `agent.followup(message)` — queue an ordinary `next-turn` message and wake the driver. It returns no completion handle; the message id identifies inbox insertion, claim, and discard facts, not a later output or `turn/end`.
 - `agent.steer(message)` — queue waking `next-step` input. An idle agent starts a turn synchronously; a running driver consumes later steering at its next step boundary.
 - `agent.inject(message)` — queue non-waking `next-step` context. A running driver claims it at the nearest later pre-step boundary; an idle driver leaves it pending until `followup()` or `steer()` wakes the driver. It may miss a request whose pre-step already claimed its batch.

packages/core/agent/README.zh.md

@@ -62,7 +62,7 @@ inbox 的实时通知刻意采用逐消息的最小载荷：`agent/inbox/inserte
 
 每个插件面向的 handle：
 
-- `agent.inbox`：agent 所拥有的持久 `agent/inbox/spliced` 事件投影。`nextTurn` 与 `nextStep` 暴露待处理的 `UserMessage` 值。`append`、`prepend`、`replace`、`remove`、`clear` 与 `splice` 用于变更队列；`replace(messageId, newMessage)` 与 `remove(messageId)` 通过 `MessageId` 跨两份列表定位待处理消息。替换可以改变标识，并先将旧消息作为 discarded 发布，再将新消息作为 inserted 发布。普通删除和 `clear()` 都是持久取消，并发出 `agent/inbox/discarded`。`claim(target)` 通过纯删除 splice 原子移除下一个候选批次，随后由循环发出 `agent/inbox/claimed`。`MessageId` 是唯一的入队项标识，在消息待处理期间必须保持唯一。
+- `agent.inbox`：agent 所拥有的持久 `agent/inbox/spliced` 事件投影。`nextTurn` 与 `nextStep` 暴露待处理的 `UserMessage` 值。`append`、`prepend`、`replace`、`remove`、`clear`、`splice` 与 `claim` 用于变更队列；`replace(messageId, newMessage)` 与 `remove(messageId)` 通过 `MessageId` 跨两份列表定位待处理消息。替换可以改变标识，并先将旧消息作为 discarded 发布，再将新消息作为 inserted 发布。普通删除和 `clear()` 都是持久取消，并发出 `agent/inbox/discarded`。`claim(target)` 通过纯删除 splice 移除下一个候选批次，随后由循环发出 `agent/inbox/claimed`。`MessageId` 是唯一的入队项标识，在消息待处理期间必须保持唯一。
 - `agent.followup(message)`：将一条普通 `next-turn` 消息排队并唤醒驱动器。它不返回完成 handle；消息 id 标识 inbox 的插入、领取与丢弃事实，而不标识之后的输出或 `turn/end`。
 - `agent.steer(message)`：将会唤醒的 `next-step` steering（中途引导）输入排队。agent 空闲时会同步启动一个轮次；驱动器运行期间收到的后续 steering 会在下一个步骤边界被消费。
 - `agent.inject(message)`：将不会唤醒的 `next-step` 上下文排队。运行中的驱动器会在最近的后续 pre-step 边界领取它；idle 驱动器则会让它保持待处理，直至 `followup()` 或 `steer()` 唤醒驱动器。若某次请求的 pre-step 已经领取完批次，它可能赶不上该请求。

packages/core/agent/src/inbox.ts

@@ -65,6 +65,7 @@ export class Inbox {
    * splices are pure deletions; the caller publishes claimed notifications.
    * @param target - whether this boundary also consumes one queued turn.
    * @returns next-step input followed by the queued turn, when requested.
+   * @internal - the agent loop's step-boundary operation, not a plugin seam.
    */
   claim(target: InboxTarget): UserMessage[] {
     const claimed = this.mutate('next-step', 0, this.nextStep.length, [], false)